Bluetooth: controller: Implement macros for vendor assert information

Implement LL_ASSERT_INFO1 and LL_ASSERT_INFO2 for triggering assertions
with parameter information provided for vendor core dump.

Adds Kconfig CONFIG_BT_CTLR_ASSERT_VENDOR by which the new LL asserts
map to BT_ASSERT_VND macros, which shall be implemented in the
debug_vendor_hal.h of the platform. If not enabled, LL_ASSERT_INFO will
map to existing BT_ASSERT_MSG with parameters printed.

Add use of LL_ASSERT_INFO2 where ull_ticker_stop_with_mark() result may
assert.

Signed-off-by: Morten Priess <mtpr@oticon.com>